Speaker
Description
The Pierre Auger Observatory, equipped with a vast Surface Detector (SD) array, is well suited to search for ultra-high-energy (UHE) neutrinos above $10^{17}$ eV through the identification of deeply penetrating air showers. The Observatory has set some of the most stringent limits on both diffuse and point-like sources of UHE neutrinos and actively contributes to multi-messenger follow-up searches of transient astrophysical events, such as gamma-ray bursts and binary black hole mergers. The sensitivity to UHE neutrinos is continuously being enhanced through several approaches, including the implementation of two additional SD triggers---Time-over-Threshold-deconvolved (ToTd) and Multiplicity-of-Positive Steps (MoPS)---which have improved detection efficiency below $10^{19}$ eV by a factor of 5-10 in the zenith angle range of $60^\circ$ to $75^\circ$. In this contribution, we provide an overview of ongoing neutrino analyses at the Observatory, highlighting a novel identification strategy that incorporates these triggers within a blind search framework. Updated constraints on diffuse and point-source neutrino fluxes will be presented, alongside a discussion of other recent results.
| Neutrino Properties | Not relevant |
|---|---|
| Neutrino Telescopes & Multi-messenger | This should be the relevant track |
| Neutrino Theory & Cosmology | Not relevant |
| Data Science and Detector R&D | Not relevant |
